Intermittent-grip device for capstans.



G. M. ELLIS & G. F. BROWN. INTERMITTENT GRIP DEVICE FORICAPSTANS.

' APPLICATION FILED FEB. 1. I911.

L2%6,3%1 o Patented May 15, 1917.

llllll IW'" lllllfii l ll i WITNESSES INVENTORS I Attorneys my NORRIS rzrzns cm, FNOm-L|THD., WASHINGTON n. c

Dakota,

GEORGE M. ELLIS, 0F MITCHELL, SOUT WINNIPEG, MANITOBA, CANADA;

H DAKOTA, AND GEORGE E. BROWN, 01? SAID ELLIS ASSIGNOE T0 SAID BROWN.

INTERMITTENT-GRIP DEVICE FOR CAPS'I'ANS.

Application filedFebruary 1, 1911.

To a LU/6077b it may concern Be it known that we, GEORGE M. 131mm and GEORGE F. BROWN, citizens of the United States, residing, respectively, at Mitchell, Davison county, State of South and at Winnipeg, Manitoba Province, Canada, have invented certain new and useful Improvements in Intermittent- Grip Devices for Capstans; and we do hereby declare the following to be a full, clear, and exact description of'the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to a capstan especially adapted for operating an endless elevator for conveying grain or the like from the dumping ground or pit at the base of a storage bin into said bin.

Our object is to utilize the teams which bring the grain to the dumping ground as the motive power for driving the capstan. It is also our aim tosimplify the construction of the capstan and, at the same time, increase its power. Further objects will become apparent from the following description.

The invention consists in the features of construction and combinations of parts hereinafter described and specified in the claim.

In the accompanying drawing:

Figure 1 is a side view of the capstan constructed in accordance with our invention showing it connected to the lower end of an endless elevator.

Fig. 2 is a plan view of the capstan, and

F ig. 3 is a broken sectional view through. the drum showing the spring for automatically rewinding the cable.

Referring more particularly to the drawing, 1 designates the stand of the capstan. Said stand comprises a framework preferably formed of a horizontal baseframe 1*, upon which are secured opposite upright frames 1 having fixed thereto superposed triangular frames 1, with their bases resting upon the frames 1", the apices of said flange 1 being adapted to form shaft-bearings, as presently seen. Said stand also includes upright approximately L-shaned supports 1 with the lower ends of their upright members secured to the longitudinal members of the base frame P. at points beyond the upright frames 1 the horizontal Specification'of Letters Patent.

.and portable structure,

arrangement will be Patented May 115, 1911?. Serial No. 606,022.

members of said supports 1 having their inner ends conformed to the inclination of, and secured to-inclined members of said triangular frames l. From this construction it will be seenv that a simple, strong, useful which is readily transportable from one point to another, is provided. On said stand there is mounted to revolve a drum 2 adapted to carry fifty feet more or less of cable or rope 3. A large gear wheel 4 is mounted on the axle 5 of said drum and meshes with a small gear 6 on another axle 7 which is also journaled on the stand. The axle 7 may be pro vided with a suitable clutch device shown in 1 as a ratchet and pawl. It will be seen that the axle 5 is journaled at the apices of the superposed frames 1, while the axle 7 is journaled on the supports 1 of said frame, thus providing for advantageously or compactly arranging said axles and effecting the intergearing of the same. The latter axle carries a large band wheel 8 over which a belt is passed. Said belt is also passed around a pulley 10 on the driving shaft of the endless elevator 11.

When a wagon and team has brought a load to the dumping ground at the base of the elevator, said team may be utilized for driving the capstan for elevating the material. This can be done by simply securing the free end of the cable or rope 3 to the rear axle or other suitable part of the wagon and driving the team away in a line transverse to the longitudinal axis of the drum 2. The unwinding of the cable or rope will turn the large gear wheel 4 which in turn will revolve the small gear wheel and the band wheel carried by its axle. The belt 9 will transmit the rotary motion of the band wheel. to the pulley 10 on the driving shaft of the elevator.

The drum is provided with a spring 12 which automatically rewinds the cable thereon after the operation of elevating the material is concluded. The advantage of this immediately appreciated by those skilled in this art.

It will be noted that the construction of our device is such that it is not necessary to unhitch the team from the wagon, which is an important consideration in saving time. The power of our capstan may be varied to suit conditions by changing the relative diameters of the large and small gears. With gears of the proportions illustrated in the accompanying drawing, the capstan is capable of elevating seventy-six bushels and twenty pounds of small grain from the pit to the bin or granary. Our device is especially handy for the farmer who has a small storage bin and does not Wish to incur the expense of installing an engine or motor for driving the capstan.

We claim:

In a device of the class described, the combination of a supporting frame, an axle mounted thereon, a shaft journaled on the frame parallel with the axle and provided with a gear, a drum having end members rotatably mounted on said axle,'one of the end members being provided with an extension having a gear to mesh with the shaft Copies of this patent may be obtained for five cents each, by addressing the gear, means to engage the surface of the drum to move the same in one direction, clutch means carried by the shaft gear whereby the shaft is also rotated in one direction, and means within the drum to deliver automatically a reverse rotation of the drum, said clutch means precluding the reverse rotation of the shaft.

In testimony whereof, we afiix our signatures, in presence of two witnesses.

GEORGE M. ELLIS. GEORGE F. BROWN. Witnesses to signature of George M. Ellis:

0. B. SMITH, FRANK WILLIAMS. Witnesses to signature of George F. Brown:

ELLEN MORRISON, E. YoUDL.

Commissioner of Patents Washington, D. G. 

